APA (7th ed.) Citation

Wright, A. L., & MacGillivray, J. H. (1955). Let's learn English. American Book.

Chicago Style (17th ed.) Citation

Wright, Audrey L., and James H. MacGillivray. Let's Learn English. New York [etc.]: American Book, 1955.

MLA (9th ed.) Citation

Wright, Audrey L., and James H. MacGillivray. Let's Learn English. American Book, 1955.